Valve.



D. M. STOTT.

VALVE.

uruoxnon FILED MAY 4, 190.1.

PatentedJan. 19, 1909.

cm, WASHINGTON. n.

PETE

UNITED *s'ra ga sgrgrnnir OFFICE.

DAVID M. SIOTT, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO HORACE E. ARGO, OF CHICAGO, ILLINOIS.

VALVE Specification of Letters Patent.

Application filed. May 4, 1908.

Patented Jan. 19, 1909.

Serial No. 430,804.

; which have been found in the working of those systems.

The objects of my invention are: let. To allow the escape of all air and steam which may accumulate in the pipes,

.. boiler and radiators as the system is being filled or while the water is being heated.

2nd. It affords a relief safety device in case for any reason, the pressure gets too high.

3rd. To prevent a vacuum when the system is cooling off or when the water is being drawn OH or for any other reason.

These objects are attained by placing my device at the top of the system and is applicable in systems where a tank is used for expansion or in any place where these objects are necessary and is accomplished by the device shown in the accompanying drawings of which Figure 1 shows a longitudinal section through the body of the valve, and Fig. 2 represents the pressure ring through which the relief tlow takes place.

Let A represent the body of the valve which is inclined by a goose nee i A and is screwed into a tee at the top of a system of piping A or leading from the heater and A the return. The inclined position of the valve body is an important feature in the invention, as will be explained later. At the uppermost end of the body A is valve gate B hinged by the cars a a formed on the body A only one of which appears, the other being cut olf by the section and between which the eye of the valve is held by the pin If. This much is like an ordinary check valve.

At the center of the gate is a projecting pin 12 screw threaded to receive a ball float C, which is normally at rest in the position shown in dotted lines down in the valve body, the latter being shaped as shown at a to receive it. On the other side of the valve is an opening a to be used in getting at the float, covered by a cap a. Behind the gate in the position shown in full lines is the pressure ring I), shown in Fig. 2 held in position by the ears of the hinge joint at the bottom and by a small lug (Z opposite the hinged side formed on the valve body.

Screwed on at the top of the valve body is the cap E made with a stuffing box for E to hold a screw 0 w th a milled head 0 fixed on the outer end for turning the screw to regulate the compression of a spiral spring F held in position against the pressure ring D by the cup f on the inner end of the screw 0. A stud d on D helps to hold the spring in position.

The opening at the top of the valve is covered by the cap E, and is sufficiently large to admit, when the cap is removed, of the introduction into position of the gate B, and the pressure ring D or to change or clean them at any time. E which is to connect with a waste pipe, not shown. A couple of lugs e c on the cap E limit the yielding of the pressure ring D against the spring.

The operation of the valve is as follows: When it is desired to fill the system with water the gate is down in the position shown in dotted lines. This allows the air to escape from the pipes through the openings in the pressure ring as the pipes fill 'ith water. hen the water level reaches the float C it lifts the gate against the seat I) stopping the flow of water in this direction. The system being full, the fire is started in the heater and heated it expands, causing a pressure in the pipes and bringing about a more rapid circulation as well as allowing the water to be heated to higher temperature without blowing off than if the pipes were connected to an 7 open tank at the top. If the pressure should go beyond the danger point the spring yields, allowing the pressure ring to move against the lugs 0 and the valve B follow ing behind takes the upright position shown in dotted lines Fig. 1, allowing the water and steam to escape under it through the pres sure ring and down the waste. After the pressure is relieved the valve would again i assume its closed position being pushed back into place by the action of the spring and would remain so until the cooling of the wal ter in the system would contract its volume and sinking in the pipe A would pull openthe valve which would asume its original An overflow is shown at I as the water 1S position. The inclination of the valve-body is such that the weight of the'gate B together with its float C will always have a,

tendency to open the valve when the'pressure is removed and the liquid descends in the pipe.

Having thus described my invention, what I claim is:

l.' In a valve, the combination of a casing provided with inlet and discharge passages, a movable valve seat within the casing intermediate said passages and provided with an opening therein, means for holding the valve' seatnormally in advanced position and adapted under pressure, to permit its backward movement toward the discharge passage, a gatecooperating with the seat and adapted to close the opening in theseat when coming in contact with the latter in its advanced position, and adapted to be moved away from said opening to-establish communication through the seat while maintaim ing contact with the seat when the-latter is moved to its retracted position, and afloat connected with the gate and adapted toregu'late its movements, substantially as described.

2. In a valve, the combination of a casing provided with inlet and discharge passages, a seat provided with an opening therein and sliclably mounted intermediate the passages, a spring for holding the seat in its ad vanced position permitting retraction there of, a gate hinged adjacent to and below the seat and adapted, when raised sufliciently to be brought into contact with the valve seat in its normal or advanced position to close the opening therein and adapted, while in contact with the seat to be further. moved sufliciently to carry back the seat against the tension of the spring and uncover the opening therein, and a float to regulate the movements of the gate, substantially as described.

8.111 a valve, the combination ofa casing, a seat slidably mounted within the casing and lying in a plane oblique to the horizontal and provided with a hole or opening, a spring for holding the seat in its normal or advanced position, a gate hinged adjacent to and below the seat and adapted to be swung up into facial contact with the seat and close the-opening therein, and adapted, while in contact with the seat to be further swung, to retract the'seat and uncover the opening therein, substantially as described.

a. In a valve, the combination of a casing, a seat slidably mounted within the casing and lying in a plane oblique to the horizontal and provided with a hole or opening, a spring for holding the seat in its normal or advanced position, a gate hinged adjacent to and below the seat and adapted to be swung up into contact with the seat and close the opening therein, and adapted, while in con tact with the seat to be further swung, to

retract the seat and uncover the opening therein, and a float connected with the gate and adapted to raise and lower the same, substantially as described.

DAVID M. sToTT. lvitnessesz FLORENCE L. HAIGHT, lVILLIA-M CUSHMAN. 

